Could my income from child support/maintenance be garnished when loosing a credit card lawsuit?

I am being sued by Discover Card. The debt is recent and apparently the account is still own by Discover but given to a lawyer/collection agency to collect the debt. I answer the summons basically denying knowledge or information sufficient to form a belief as to the allegations.

Most likely the Plaintiff will be able to come up with the required paperwork to prove the debt. My question is, in the case I loose the lawsuit, my only income is child support/maintenance. Could the judge order to garnish this income?
Am I be able to make affordable payent arrangements then? - Is this your question? Add additional information